Water Softener & Filtration Installation in Manassas, VA
Manassas homes get moderately hard (confirm) water from City of Manassas. We soften it, remove the disinfectant and polish your drinking water for $2,499 installed.
What is in Manassas's water
Manassas is one of the few DMV cities with its own reservoir and treatment plant, so its water profile differs from Fairfax Water. We pull the current city report before sizing anything for a Manassas home rather than assuming county-wide numbers.
Seasonal changes
Check the city's annual report for seasonal changes.
Lead and older plumbing
Old Town Manassas has pre-1950 housing where older plumbing is common. Lead does not come from the treatment plant.
PFAS: Ask for the latest city PFAS monitoring results. Reverse osmosis at the kitchen tap addresses PFAS regardless of the source.
Water utility
City of Manassas Utilities
The City of Manassas treats its own water from Lake Manassas. Manassas mailing addresses in the county (20109, 20112) are on Prince William Water instead.
- Hardness
- Moderately hard (confirm)
- Moderately hard (confirm) (approximate, confirm with latest report)
- Disinfectant
- Not yet confirmed
- We confirm before ordering media
- Source
- Lake Manassas (Broad Run), treated at the city-owned plant
Manassas is one of the few DMV cities with its own reservoir and plant. Its water profile is different from Fairfax Water, which is why we never size a Manassas system from county-wide assumptions.
Checked September 2026. Source: City of Manassas.
Homes in Manassas
Old Town Manassas has pre-1950 homes with older plumbing, while Wellington and Sumner Lake are 1980s to 2000s subdivisions with basements. We inspect the older houses for galvanized pipe before quoting because it affects flow and install location.
What we usually install here
A softener and carbon system sized from the current city report, plus under-sink reverse osmosis.
Manassas pricing, published
Prices include equipment, a licensed plumber's installation and startup for a standard install. If anything about your home changes the price, you hear it before we book the plumber, not after.
Whole-Home + Drinking Water
The complete package for a municipal-water home.
$2,499installed
- Metered whole-home softener
- Catalytic carbon for chloramine and chlorine
- Sediment pre-filter and bypass
- 5-stage under-sink reverse osmosis with faucet
- Licensed installation, startup and salt
Whole-Home Only
Soft, chlorine-free water at every tap and shower.
$1,899installed
- Metered whole-home softener
- Catalytic carbon media
- Sediment pre-filter and bypass
- Licensed installation, startup and salt
- Add reverse osmosis any time
Reverse Osmosis Only
Clean drinking water for condos and kitchens.
$799installed
- 5-stage NSF/ANSI 58 system
- Removes lead, PFAS and dissolved solids
- Dedicated lead-free faucet
- Optional fridge and ice line
- Licensed installation and first filters
Standard install covers
- Main water line, a drain and an outlet within reach in a basement, garage or utility room
- Kitchen sink with cabinet space for the reverse osmosis unit
- Copper or PEX supply lines in serviceable condition
- Permit where your jurisdiction requires one
Quoted before we book
- Long plumbing runs to reach the main line, or adding a drain or outlet
- Crawlspace or exterior installs, and galvanized pipe that needs replacing
- Private wells: lab test first, then a system designed to the results
- Fridge and ice maker line for the reverse osmosis unit
Water problems we fix in Manassas
How it works in Manassas
Request a consultation
Send your address and the service you want. We check your utility's published hardness and disinfectant and ask a few questions about your home.
Get one firm price
Within a business day you get the exact equipment we recommend, with model numbers, and an installed price that does not change on install day.
Licensed plumber installs it
A licensed, insured plumber installs the system in two to four hours, tests it, and walks you through salt and filter changes. Then you forget about it.
Manassas neighborhoods we serve
- Old Town Manassas
- Georgetown South
- Point of Woods
- Wellington
- Sumner Lake
- Manassas Park
- Bull Run
- Cannon Ridge
ZIP codes: 20110, 20111
Manassas water questions
How hard is the water in Manassas?
Manassas is served by City of Manassas Utilities. We expect Moderately hard (confirm), which is moderately hard (confirm). Lake Manassas is a reservoir source in the Piedmont, so hardness is expected to be moderate. We confirm the current figure from the city report before sizing a softener.
Does Manassas tap water contain chloramine?
We confirm the disinfectant from the utility's latest report before specifying carbon media for a Manassas home. Disinfectant type not yet confirmed from the city report. We verify before specifying carbon media.
How much does a water softener cost in Manassas?
$1,899 installed for a metered softener with catalytic carbon, or $2,499 with an under-sink reverse osmosis system. That covers equipment, a licensed plumber's installation and startup for a standard install; we quote any extras before booking.
Do you install in Manassas townhomes and condos?
Townhomes, yes, usually with a compact single-tank softener in the utility closet. Condos where the building supply cannot be modified get an under-sink reverse osmosis system, which handles drinking water taste, lead and PFAS without touching shared plumbing.
Is Manassas water safe to drink?
Yes. City of Manassas meets federal and state standards, and we will never claim otherwise. A home system addresses comfort (hardness, disinfectant taste and smell) and, at the kitchen tap, contaminants that enter from home plumbing such as lead.